5 Papers
6 Citations
Qi Liu is an academic researcher from Huazhong University of Science and Technology. The author has contributed to research in topics: Optical fiber & Core (optical fiber). The author has an hindex of 3, co-authored 5 publications.
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Papers
Noninvasive Monitoring of Vital Signs Based on Highly Sensitive Fiber Optic Mattress
TL;DR: Clinical experimental results of eighteen subjects indicate that the mattress system could not only distinguish the activity states of no body, on bed, body movement and off bed, but also contribute to clinical diagnosis of bradycardia, tachycardsia, polypnea and apnoea.
High resolution and large sensing range liquid level measurement using phase-sensitive optic distributed sensor.
TL;DR: A distributed optical fiber liquid level sensor is proposed and demonstrated based on phase-sensitive optical time domain reflectometry (φ-OTDR), which can detect the liquid level with a large measurement range by interrogating the phase information along the fiber due to the temperature difference between the liquid and air.
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High capacity fiber optic sensor networks using hybrid multiplexing techniques and their applications
Qizhen Sun,Xiaolei Li,Manliang Zhang,Qi Liu,Hai Liu,Deming Liu +5 more
- 20 Dec 2013
TL;DR: This paper proposes the concept of “Microstructure－Optical X Domin Refecltor (M-OXDR” for fiber sensor network expansion and presents the architecture of hybrid multiplexing sensor passive optical network (HSPON), and the key technologies for integrated access and intelligent management of massive fiber sensor units.
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Distributed Liquid Level Measurement with High Sensitivity and Large Sensing Range Based on ϕ-OTDR
Qi Liu,Tao Liu,Tao He,Hao Li,Zhijun Yan,Qizhen Sun +5 more
- 23 Nov 2020
TL;DR: In this paper, a distributed optical fiber liquid level sensor is proposed and demonstrated based on phase-sensitive optical time domain reflectometry (φ-OTDR) in order to detect the liquid level with a large sensing range by interrogating the phase information along the fiber due to the temperature difference between the liquid and air.
Immobilized optical fiber microprobe for selective and high sensitive glucose detection
TL;DR: In this article, an optical fiber microprobe functionalized with Glucose oxidase (GOD) has been proposed for bio-selective and high-sensitive glucose detection taking advantage of the free amine groups of 3-aminopropyl- triethoxysilane (APTES), the enzymes are immobilized on the multimode microfiber through covalent interaction Surface characterization offered by optical microscopy, scanning electron microscope and multiphoton laser scanning microscopy provide detailed evidences about the effect of the bio-functionalization.